383 LT1 Stumbling problem

[thehotrodguy]

Hello my name is Oscar and I have 93 Firebird with a 383 LT1 with a Vortech 12 PSI supercharger. I have it running pretty good except for a stumbling problem. As long as I do not stomp on the gas hard it works well and will rev up pass 6000 RPM with not problem. Also if I ease up to any RPM and then stomp on it I have the same problem. Any ideas any help will be greatly appreciated.

Thanks

TheHotRodGuy